
Solo 401(k) vs. SEP-IRA in 2026: Picking the Self-Employed Retirement Plan That Actually Shelters the Most Income
A 2026 comparison of solo 401(k) and SEP-IRA plans for the self-employed, with contribution math at $60K, $120K, and $300K of net income, SECURE 2.0 Roth catch-up and super catch-up rules, setup deadlines, and a decision framework for picking the plan that shelters the most income.










